Photographic burnishing-mach ine



M Model. 2'SheetsSheet 1. W. G. ENTREKIN.

PHOTOGRAPHIG BURNISHING MACHINE. No. 357,954. Patented Feb. 15, 1887.

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UNITED STATES PATENT OFFICE.

WILLIAM G. ENTREKIN, OF PHILADELPHIA, PENNSYLVANIA.

PHOTOGRAPHIC BURNlSHlNQ-MACHINE.

SPECIFICATION forming part of Letters Patent No. 357,954, dated February 15, 1887.

Application filed May14,1886. Serial No. 202,160. (No modcL) To all whom it may concern:

Be it known that I, WILLIAM G. ENTREKIN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Photograph-Burnishin g Machines, of which the following is a specification.

One object of my invention is to permit ready access to all parts of the burnishing-rollwhen necessary, further objects being to provide simple and efficient means for retaining and protecting the-springs which act upon the bearing-boxes of the upper roll, and to prevent the rolls from being brought into contact with each other. These objects I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawings, in which- Figure l is a side view of a photograph-burnisher constructed in accordance with my in vention; Figs.2 and 3, transverse sections of the machine; Fig. 4, a side view of part of the machine with the upper roll in a different po sition from that shown in Fig. 1; and Fig. 5, a longitudinal section, partly in elevation, on the line 1 2, Fig. 1.

A A are the opposite side frames of the machine, to fixed bearings in which are adapted the journals to of the lower or burnishing roll, B, thejournals b of the upper or feed roll, D, being adapted to boxes d, adjustable vertically in guides formed by the upper portions of the frames A, the depression of each box being effected by means of a set-screw, f, and the elevation of the box bya spring, 8, the setscrews passing through threaded openings in the cap plate f, and the springs 8 being interposed be tween the boxes (1 and bearings on the frames A. (See Fig. 1.)

Thejournals of the upper andlower rolls are connected at one side of the machine by spurgearing-such, for instance, as that shown by into a small pinion on an independent crankshaft, as shown, for instance by the dotted lines in Fig. 1, this arrangement being also of advantage in imparting the desirable slow speed to the burnishing-roll.

The lower portion of the roll B is embraced by the concave upper portion, h, of the heating shield or hood F, which, as is usual in machines of this class, receives the flame of a lamp or gas-burner and transmits heat by radiation to the roll 13. This hood or shield must, however, be removed at times to permit access to the lower roll, and in order that such access may be unobstructed by the hood, I provide one side of thelatter, at each end, with an ear, 73, these cars being hung by pins m to lugs n on the end frames, A, of the machine.

When the hood is in the working position shown in Fig. 2, it is retained by a spring-pin, p, guided in one of theframesA, the inner end of this pin entering an opening, 1), in the end plate of the hood, as shown in Fig. 5; but 011 withdrawing the pin the vhood can be swung laterally, so as to be entirely out of the way and permit free access to all parts of thelower roll. (See Fig. 3.)

Each spring 3, which serves to elevate one of the boxes of the upper roll, is adapted to a socket, t, on the under side of the said box, and when the upper roll is depressed, so as to be in the operative position, the springis contained entirely within the socket, (see Fig. 4,)and is thereby protected in great measure from heat radiated from the roll and from the hood beneath the same, while the direct transmission of heat to the spring from the box or from the frame of the machine is prevented, owing to the fact that the diameter of the socket is less than the width of the .box, so that cool air can circulate entirely around the socket. The socket also-serves to prevent the displacement of the spring, and by contact with the frame A acts as a stop to prevent such a depression of the upper roll as would bring the roughened surface of the same into contact with the polished surface of the lower or burnishing roll.

The sockets '4 may be formed on the frame A, if desired, instead of on the boxes (I; but the latter construction is preferred.

I claim as my invention- 1. The combination of the frame of a burnisher, the lower roll having fixed bearings, the upper roll having its bearings in adjustable boxes, and lifting-springs adapted to seek ICO ets which inelose and protect said springs when the upper roll is depressed, the casings of said sockets being of less external diameter than the width of the upper boxes, whereby a circulation of air around said casings is permitted, all substantially as specified.

2. The combination of the frame of the burnisher, the lower roll adapted to fixed bearings, the upper roll, and adjustable jOurna1- 3. The combination of the burnisher-frame and its upper and lower rolls with the hood F, partially embracing the lower roll, and pivoted to the frame at one side of said lower roll, whereby said hoodean be swung laterally, so as to wholly expose the lower roll, all substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

XV. G. ENTREKIN.

Witnesses:

WILLIAM D. CONNER, HARRY SMT'JII. 

